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Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/cxl/context.c11
-rw-r--r--drivers/misc/cxl/cxl.h7
-rw-r--r--drivers/misc/cxl/file.c6
3 files changed, 21 insertions, 3 deletions
diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c
index 4aa31a3fb448..51fd6b524371 100644
--- a/drivers/misc/cxl/context.c
+++ b/drivers/misc/cxl/context.c
@@ -34,7 +34,8 @@ struct cxl_context *cxl_context_alloc(void)
/*
* Initialises a CXL context.
*/
-int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master)
+int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master,
+ struct address_space *mapping)
{
int i;
@@ -42,6 +43,8 @@ int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master)
ctx->afu = afu;
ctx->master = master;
ctx->pid = NULL; /* Set in start work ioctl */
+ mutex_init(&ctx->mapping_lock);
+ ctx->mapping = mapping;
/*
* Allocate the segment table before we put it in the IDR so that we
@@ -147,6 +150,12 @@ static void __detach_context(struct cxl_context *ctx)
afu_release_irqs(ctx);
flush_work(&ctx->fault_work); /* Only needed for dedicated process */
wake_up_all(&ctx->wq);
+
+ /* Release Problem State Area mapping */
+ mutex_lock(&ctx->mapping_lock);
+ if (ctx->mapping)
+ unmap_mapping_range(ctx->mapping, 0, 0, 1);
+ mutex_unlock(&ctx->mapping_lock);
}
/*
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index 7c05239359df..28078f8894a5 100644
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h
@@ -398,6 +398,10 @@ struct cxl_context {
phys_addr_t psn_phys;
u64 psn_size;
+ /* Used to unmap any mmaps when force detaching */
+ struct address_space *mapping;
+ struct mutex mapping_lock;
+
spinlock_t sste_lock; /* Protects segment table entries */
struct cxl_sste *sstp;
u64 sstp0, sstp1;
@@ -599,7 +603,8 @@ int cxl_alloc_sst(struct cxl_context *ctx);
void init_cxl_native(void);
struct cxl_context *cxl_context_alloc(void);
-int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master);
+int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master,
+ struct address_space *mapping);
void cxl_context_free(struct cxl_context *ctx);
int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma);
diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c
index 378b099e7c0b..e9f2f10dbb37 100644
--- a/drivers/misc/cxl/file.c
+++ b/drivers/misc/cxl/file.c
@@ -77,7 +77,7 @@ static int __afu_open(struct inode *inode, struct file *file, bool master)
goto err_put_afu;
}
- if ((rc = cxl_context_init(ctx, afu, master)))
+ if ((rc = cxl_context_init(ctx, afu, master, inode->i_mapping)))
goto err_put_afu;
pr_devel("afu_open pe: %i\n", ctx->pe);
@@ -113,6 +113,10 @@ static int afu_release(struct inode *inode, struct file *file)
__func__, ctx->pe);
cxl_context_detach(ctx);
+ mutex_lock(&ctx->mapping_lock);
+ ctx->mapping = NULL;
+ mutex_unlock(&ctx->mapping_lock);
+
put_device(&ctx->afu->dev);
/*